Text slideshow
- 1. 2.1&2.2 Notes Elias Giron
- 2. Compounds, mixtures, and Elements • Mixtures- Two or more substances that are not chemically combined. Substance remains with their characteristic properties • Elements- Simplest form of pure substance, cannot be broken down. • Compounds- Two or more pure substances that are chemically combined, and can be broken into substances chemically
- 3. Solutions & Types of Mixtures • Homogenous Mixture- The particles are so evenly distributed that it is hard to distinguish. Appears the same throughout • Solution- is a homogenous when one substance dissolves into another. The one dissolving is the solvent and the one being dissolved the solute. • Heterogenous- Not uniform throughout
- 4. Colloids • Particles are mixed but not dissolved, with the large particles they are kept suspended • It will not separate upon standing, and the particles are always hitting, which makes it look cloudy.
- 5. Viscosity, Conductivity, malleability • Viscosity- The thickness or resistance to flow of a liquid. Depending on temperature • Conductivity- A materials ability to let heat or electricity pass through it • Malleability- A materials ability to be hit without shattering. How sturdy something works.
- 6. Melting & boiling point • The temperatures at which a substance boils or melts in degrees Celsius.
- 7. Filtration • The process that separates particles based on their size.
- 8. Distilation • Distillation is the process that separates the substances in a solution based on their boiling point.
- 9. Evaporation • The process that changes a substance from a liquid to a gas or the opposite by reaching boiling point. • Ex. Water-Ice
- 10. Flammability • This is a materials ability to burn in the presence of oxygen. • E.X.= Alcohol and Hydrogen
- 11. Reactivity • How readily a substance combines with other substances and chemicals is reactivity. • EX. Rust and if you throw potassium at the water, it explodes.
- 12. Chemical Changes • Occurs when a substance reacts and forms one or more new substances. • The three common types of evidence for this is, Change in color, Production of a gas, and the formation of a precipitate.
- 13. Physical Changes • Occurs when some of the materials change, but the substance they the same.
- 14. Physical Properties • Odor- What something smells like. • Melting/freezing point- The temperature at which a solid changes phase to a liquid. • Boiling Point- The temperature at which a liquid turns into a gas. • Solubility- The ability of a substance to dissolve into another.
- 15. Density/Viscosity • Density- How compact a material is. • Viscosity- The resistance to flow, this can vary by the temperature.
- 16. Question #1 • What kind of change is happening when you put bleach on jeans?
- 17. Question #2 • What type of mixture is NOT uniform throughout?
- 18. Question #3 • What is the simplest form of a pure substance?
- 19. Question #4 • What is Viscosity?
- 20. Question #5 • What are the types of filtration?